Boiler.



WITNESSES:

L. A. CHERRY.

BOILER.

APPLICATION FILED FEB-24,1916.

Patented N 0v. 5, 1918.

2 SHEETS-SHEET l- N ATTORNEY L. A. CHERRY.

BOILER.

APPLICATION FILED FEB. 24. 1916. 1 ,283,668, Patented Nov. 5, 1918.

Q 2 SHEETS-SHE-ET 2. h L R l P \c x zwzamzw 43min] 5g v b d ATTORNEY and to have a thinner bed. v were charged with the full v1de a device wherein the I separate from the furnace. This con- UNITED STATES PATENT OFFICE.

LESTER A. CHERRY, OF BUFFALO, NEW YORK, ASSIGNOR TO THOMPSON HEATER CORPORATION, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

BOILER.

To all whom it mag concern.

Erie,-and State of New York, have invented certain new and useful Improvements in Boilers, of which the following is a full, clear, and exact description.

My invention relates generally to boilers, and more particularly to a boiler whlch has a plurality of vertically arranged sections with flues' provided therebetween.

It is well known to those skilled in-the art that if a boiler is designed for an eight hour firing period and the user desires to increase the burning period to, say, twelve hours, it'

is, of course, necessary for him to get boiler whos furnace will hold fifty per cent. more fuel. The boiler and furnace being inseparable, he must make the boiler also fifty per cent. larger, thus entailing unnecessary expense. Furthermore, the furnaces of the boilers of the present art are so designed that each one will burn but one type of coal. For instance, in one designed for using coarse coal it will be arranged for a unit burning periodto have a thick coal bed. Should the user desire to use fine coal, it will be impossible to charge the furnace with the amount of coal necessary to burn for this unit lourn-v ing period. With the finer coal it will be necessary for him to charge more frequently amount of fine coal, the resistance of the fuel bed to the passage of air would be so great that the chimney would not be able to furnish the necessary draft. On the other hand, if the furnace is designed for a thin bed of coal of fine quality and a coarser, coal were used, the passage of air through the coarse fire bed would be excessive, and there would be a large quantity of heat lost up the chimney and a comparatively small quantityuti lized in the boiler. In constructing my boiler, I have sought to overcome these disadvantages and to proboiler proper shall struction makes it possible for the user to increase the size of his furnace so as to 've him a greater burning period without having to increase the size of the boiler beyond his requirements. I

Another object has been to provide a fur If the furnace may be used Patented Nov. 5,1918.

Application filed February 24, 1916. Serial No. 80,181.

nace having a vertically arranged fire, and vertically arranged grate members which may be changed in position so as to provide a thin or thick fuel bed. By this construcwithout having the disadvantages above .mentioned.

It is well known that when burning soft coal the volatile gases are distilled at the top the coal is at low heat, and in orderto utilize these gases it is necessary that they be raised to the temperature of ignition. In my device this is accomplished by arranging the fines so that all of the gases coming from ,the coal are obliged to pass downwardly and thus be mixed with the highly heated gases coming from the incandescent coal. Furthermore, by this construction the formation of smoke is substantially prevented. In boilers of the type where the gases pass upwardly, immediately after leaving the fire, the volatile ases coming off from the top of the fire pass directly through the fiues and out of the chimney without being ignited and burned, which results not only in' waste, but in the production of smoke.

Another object of my invention has been to provide a construction which shall separate or divide the functions of the ordinary horizontally arranged grate so as to overcome the disadvantages resulting from this construction. It is well known that in theordinary grate, after the lire has been burning for some time, it becomes thereby shut oil the draft of air which should pass up through the same. I have provided ,in my device vertically disposed covered with ashes and grate members, which are arranged at some point above the coal supporting members, upon which the ashes are formed. These grate members are, therefore, never clogged with ashes, but are always free to supply the fire with the necessary amount of air.

Another object has been to proivide a boiler which may be used effectively with and to so arrange the v burner may be permanently located in a position where it will not be in ured by the heatcoming from the coal rnace. Inmy arrangement, gas or coal either separately or jointly, as

desired.

Moreover, my device is so constructed that the unburned volatile gases, the heated gases and the auxiliary supply of air furn shing additional oxygen, all unite and combine at the hottest point of the furnace, thus utilizing, as far as possible, the available heat in the fuel.

Heretofore in boiler construction it has been impossible to effectively and permanently pack the joints between the ribs on the sections forming the fiues. In my dev1ce, I provide a packing between the sections for the ribs forming the fiues, as well as around the edge of the sections, which shall be effective in sealing these joints, as well as being permanent and resilient. By this con struction it is not necessary, finish the faces of the sections where they come together, as my packing means 18 such that it takes care of the inequalities in the sections resulting from inaccuracies when being cast.

Another object has been to provide an improved nipple joint between the sections. It is well known that, at present, tapered nipples are placed in correspondingly tapered apertures in each section and the sections drawn together by means of pressure. In order that. the sections may be drawn to a predetermined center, some nipples are drawn up tighter than others, thus causing an undue strain in this part of the boiler. Should a strain from casting occur at this point, it is likely that when the boiler is 1n use this part will give way. jointv between my sections there is no strain produced ing is used which effectively packs the joint. The construction is such that the resilient packing is not subjected to the pressure of the water or steam contained in the boiler.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, forming a part of this application. In the drawings:

Figure 1 shows a vertical, sectional elevation of my boiler.

Fig. 2 is a sectional, plan view of Fig. 1, taken on line 22 thereof.

Fig. 3 is a fragmentary, taken on line 3-3 of Fig. auxiliary air passage.

Fig. 1 is a fragmentary, sectional view taken on line 4- of Fig. 1, showing the joint between two sections and the resilient packing.

Fig. 5 is a fragmentary, sectional view taken on line 5-5 of Fig. 1, showing one of the nipple joints sectional view, 1, showing the a modified form of my boiler.

Fig. 8 is a fragmentary, sectional plan view of the form shown in Fig. 1, .taken on line in any wise, to

two members are placed together a In making the in these parts, and a resilient packbetween the boiler sections. Fig. 6 is a front elevation of two of they and is 8-8 thereof.

Fig. 9 1s a fragmentary view form of coal support provided with movable grates.

Fig. 10 is a sectional view 101() of Fig. 9.

Referring now more particularly to Figs. 1 to 6, inclusive, 12 is the furnace part of my device and 13 the boiler part thereof. These parts are formed separately and are fastened together by any suitable and well known means. The furnace part is provided across its front portion with a plurality of water carrying grate members 1st. These members are preferably arranged at a slight angle with the vertical line, but may, if desired, be arranged vertically or inclined in a direction opposite to that shown. These grate members are connected together at their ends by a nipple joint shown in Fig. 5 to be described hereafter. The members 14 are protaken on line vided near their lower ends with recesses 0r indentations 15 in their sides so that when plurality of air openings will be provided through which the air for combustion is supplied. The furnace part of my device is surrounded by a suitable casing 16, which is provided on its upper side with a charging opening 17, having a. door 18. An opening 19 extends across the front of the furnace casing, preferably near the center thereof, through which the air is supplied for the fire. This opening is provided with a door 20, which is controlled by suitable means, thereby governing the amount of air which passes through the opening 19 to the fire. This opening is so arranged that a bar may be passed down through the recesses 15 in the grate members for the purpose of cleaning the fire. A suitable ash opening 21 and door 22 are provided. Through the ash opening 21 the ashes and clinkers may be drawn into the ash pit. This casing 16 of the furnace is placed against the front of the boiler part 13 of my device, and the coal magazine and fire bed are thus formed between the front of the boiler part 13 and the grate members 14. a

The boiler part 13 of my device comprises a plurality of boiler section 23. Each of these sections is provided with an outwardly pro ecting coal supporting member 24, which is preferably cast integral. with. the section and provided with a water way. Each of the members 2 1 is preferably provided with a plurality of laterally extending fingers 25. section 23 is provided a plurality of louvers 26, which are arranged to come opposite the burning zone and that openings will be provided for the draft and at the same time prevent coal At the front of each boiler are angularly disposed so of a modified ion A downwardly extending rib 27 is promore as guide for registering the sections. Vided on each section, starting from a point The packlng 39 serves to securely pack the near the upper part of the front portion of oint against leakage, and after use the nipthe section and extending down to a point ple will become rusted and. tightlytitted wall of each section, immediately beneath 1s so designed that the packing 39 is prothe point where the rib 27 meets it has an tected from the boiler pressure, which would near thebottom of the'boiler. In the front into position. It Wlll be seen that this o nt I opening 52, through which any gases, which tend to blow it out.

may collect in the upper part of the maga- Near the bottom of each of the boiler seczine, may escape and thence be deflected Q s 18 arranged an opening 41, which prodownwardly by the rib 27. Another rib 28 vides means for cleaning the lower portion extends from the lower rear portion of each of the fiues. Another clean out opening 42 section upwardly toward the top of the is provided at the top of' each section, and

boiler. These ribs are formed on opposite is closed by means of a cover 43.

sides of each section; one is provided with My device is provided at each end with a groove 29 (see Fig. 4) and .the one on the a water casing 49, which extends over both opposite side with a ridge 30. When assemthe boiler part and the furnace part, thus bled, the ridge 30 on one section will engage forming the two ends of the fire box. Each with the groove 29 on the other section. of these casings is provided with water Before assembling, a resilient packing 31 is spaces and on their inner surfaces the necesplaced within each groove 29 with which sary ridges for connecting. with the ridges the ridges 30 engage when the sections are of the end sections, thus forming -flues. drawn into place. The outer edges 67 of Ridge portions are also provided which each boiler section 23 is also provided with register with the grate members 14, and one the ridge and groove packing means shown of these casings is provided with a water in Fig. 4. inlet 50. 51 is a water or steam outlet con-' tion which 18 atone side of the joint, and a R The lower front edge portion 68 of each nected with one or more of the boiler secboiler section isprovided with a plurality of tions 23. similar ridges 44 on one side anda like When manufactured, the grate members plurality of registering grooves 45 on the 14 of my boiler are adjustably placed in the opposite side. Resilient packing 46 is placed necessary position to burn the desired kind in these grooves, thus packing these joints of coal. These grate members are connected and providing a passage 47 between ,adjaat each end with the water spaces in the cent boiler sections. This passage 47 conwater casings 49.,

nects, at the bottom of each section, with an In Fig. 1', 53 "is a gas burner, one being opening 48, which acts as aheader to supply located within the fiues between each pair additional air to each of the passages. These of the adjacent sections of. my boiler. These passages extend upwardly and inwardly and burners are located in a position where'they scharge at a point where the gases coming will beeflicient when used and yet be out from the fire are the hottest. The air thus ofthe range of the fire or hot gases coming supplied mixes with the heated gases and at therefrom; They are thus protected from the same time assists in mixing the burning injuryand will lastindefinitely. 7

" and unburned gases from the'fire. At the My boiler is preferably provided with an I I rear- 0f the sections isa lateral flue 32, which h prinkler 54,- which is pivotally mounted connects all of the fines formed between the close to the boiler sectionsand beneath the sections, andconveys the gases to the smoke l. u t 24, It i connected ith a 1 outlet collar 33. v water-supply pipe 55 by means of iping 56,

Each of he b ll rse p 18 nn t which is arranged with three flexible joints together y a nipple oint like that here n-J so that it may be moved in and out, thus before referred to d ly Seen g-. causing the sprinkler 54 130 be oscillated and 5 Ahub 34 is provided, on the boilersecl thereby cover the entire ash. pit.

eferring now to Figs. 7 and 8, I show a hub 35 S pmylded n the adjacentb modification of my boiler which is designed section which is on the opposite side of the to have tubular sections insteadlgof the flat oint. The surfaces 36 of the hubs 3'4 and 35 ections shown in the other form- This form are machined and the hub 34 is provided with also embodies a construction iii-which the a short annular rib 37 which engages wlthj' end water sections have been dispensed with n n l gr o 38 or d nb and center sections only are used, the Whole resilient pack ng 39 and after the nipple 40 bn k work, I V 7 is placed within the tapered openings, The g at members 57, as hown, in this Within the groove 38 is placed a strip 'of being surrounded at the back and sides with I through the-hubs 34 and 35, the sections are form are each preferably provided at their es -nipple and-theopenings, this nipple acting at the bottom of the fire. The sections 59 in, 130' 62. In this form of my device, the grate members 57 are connected with the boiler sections 59 by means of p1ping 62.

Referring now to Figs, 9 and 10, (where I, show a modified form of coal support) 63 represents the boiler sections, each of which is provided with an outwardly extending coal support 64. These supports are of such a width as to provide a space 65 therebetween. in this space is arranged a movable grate member 66 for the removal of ashes and clinker-s.

If desired, the coal supports 24 may be made separate from the boiler sections, or they may be entirely dispensed with and movable grate members provided in their place.

These and other modifications of the details herein shown and described may be made without departing from the spirit 0 my invention or the scope of the appended claims, and I do not wish to limit myse to the exact embodiment herein shown anc described.

Having thus described my invention, what I claim is:

1. The combination of a boiler comprising a plurality of vertically arrange sections, and a furnace for heating said boiler sections separably united therewith, each boiler section comprising a downwardly eX- tending rib which starts from and connects with the front portion of the boiler section and extends toward the bottom and in front of the flue opening in the furnace portion,

the ribs of adjacent sections being in contact,

one with the other, to form lines for the products nets of arably united therewith, each of combustion, whereby the prodcombustion from the furnace are directed downwardly.

2. The combination of a boiler comprising a plurality of vertically arranged sections, and a furnace for heating said boiler sections separably united therewith, each boiler section comprising a downwardly extending rib which starts from and connects with the front portion of the boiler section and eX- tends toward the bottom and in front of the fiue opening in the furnace portion, and a second rib extending upwardly from the rear portion of each boiler section toward the top, the ribs of adjacent sections being in contact, one with the other, toform fiues for the products of combustion, whereby the roducts of combustion from the furnace are directed downwardly. 3. The combination of a boiler comprising a plurality of vertically arranged sections, a furnace for heating said boiler sections sepboiler section comprising a downwardly extending rib which starts from and connects with the front portion of each boiler section and extends toward the bottom and in front of the flue openings in the furnace portion, the ribs of adjacent sections being in contact, one with the other, to form fines for the products of combustion, and means for introducing fresh air near the bottom of the boiler sections and directing it upwardly to a point above the lower edge of said downwardly eX- tending rib, whence it is admitted into the fines of the boiler sections.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

LESTER A. CHERRY.

Witnesses:

J. WM. ELLIS, WALTER H; KELLEY. 

